Carbon nanostructure, and method and apparatus for manufacturing carbon nanostructure

Patent metadata

Field	Value
Publication number	US-9493354-B2
Application number	US-201414770630-A
Country	US
Kind code	B2
Filing date	Jan 28, 2014
Priority date	Feb 27, 2013
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A method for manufacturing a carbon nanostructure according to the present invention includes a preparation step of preparing a base body, an oxidization step and a step of growing a carbon nanostructure. In the step of preparing a base body, a base body with at least a part of a contact portion or an integral portion of a catalyst member and a separation member having been oxidized is prepared. In the step of growing a carbon nanostructure, a carbon nanostructure is grown in a separation interface region between the catalyst member and the separation member. The step of growing a carbon nanostructure includes at least one of a step of locally supplying a source gas to a portion of the catalyst member facing the separation interface region where the carbon nanostructure is being grown, and a step of locally heating the separation interface region.

First claim

The invention claimed is:

1. A method for manufacturing a carbon nanostructure, comprising the steps of:
preparing a base body formed of a catalyst member including a catalyst and a separation member that are integral with each other, at least a part of an integral portion of said catalyst member and said separation member having been oxidized; and
growing a carbon nanostructure in a fracture interface region between said catalyst member and said separation member, by heating said base body with said separation member being separated from said catalyst member while supplying a source gas containing carbon to said base body,
said step of growing a carbon nanostructure including at least one of a step of locally supplying said source gas to a portion of said catalyst member facing said fracture interface region where said carbon nanostructure is being grown, and a step of locally heating said fracture interface region.

2. The method for manufacturing a carbon nanostructure according to claim 1 , wherein, in said step of growing a carbon nanostructure, both of said step of supplying a source gas and said step of locally heating said fracture interface region are performed.

3. The method for manufacturing a carbon nanostructure according to claim 1 , wherein, in said step of growing a carbon nanostructure, a portion other than said fracture interface region in said catalyst member is cooled.

4. The method for manufacturing a carbon nanostructure according to claim 1 , wherein, in said step of growing a carbon nanostructure, said carbon nanostructure is grown with particles containing said catalyst member being included within said carbon nanostructure.

5. The method for manufacturing a carbon nanostructure according to claim 1 , wherein said catalyst member contains metal that dissolves carbon.

6. The method for manufacturing a carbon nanostructure according to claim 5 , wherein said base body contains at least one type selected from the group consisting of FeO, Fe 3 O 4 and Fe 2 O 3 .

7. The method for manufacturing a carbon nanostructure according to claim 1 , wherein said catalyst member is a porous body.

8. The method for manufacturing a carbon nanostructure according to claim 1 , wherein, in said step of growing a carbon nanostructure, said source gas is discharged from said catalyst member in a direction opposite to a direction in which said separation member is separated from said catalyst member.

9. A method for manufacturing a carbon nanostructure, comprising the steps of:
preparing a base body formed of a catalyst member including a catalyst and a separation member that are integral with each other, at least a part of an integral portion of said catalyst member and said separation member having been oxidized; and
growing a carbon nanostructure in a fracture interface region between said catalyst member and said separation member, by heating said base body with said separation member being separated from said catalyst member while supplying a source gas containing carbon to said base body,
in said step of growing a carbon nanostructure, by partially separating said catalyst member from a surface portion of said catalyst member where said carbon nanostructure is being grown to be drawn into said carbon nanostructure, said carbon nanostructure is grown continuously while a newly formed surface appears at said surface portion.

Assignees

• Sumitomo Electric Industries

Inventors

• Hikata Takeshi
• Okubo Soichiro
• Utsunomiya Risa
• Higashi Yugo
• Fujita Jun-Ichi
• Murakami Katsuhisa

Classifications

• B01J23/745 Primary

  Iron · CPC title

• C01B31/0233 Primary

  Chemistry & Metallurgy · mapped topic

• C23C16/26

  Deposition of carbon only · CPC title

• B01J23/74

  Iron group metals · CPC title

• B01J35/0013

  Operations & Transport · mapped topic